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MessagePack for Python: Out-of-bounds read / crash on Unpacker reuse after a caught error

MessagePack for Python: Out-of-bounds read / crash on Unpacker reuse after a caught error

CVE-2026-57585Published 2 months agoUpdated 2 weeks agoSource: OSV

Affected packages

  • msgpackbefore 1.2.1

Exploit signal

Known exploited (CISA KEV)
No
EPSS score
EPSS percentile

EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.

MessagePack for Python: Out-of-bounds read / crash on Unpacker reuse after a caught error | HackTribune